Are you looking for new spark plugs for your generator but don’t know how to choose? We have good news for you! Here you’ll find tips on what to consider when choosing the right spark plugs for generators.

 

Let’s get started!

 

1) View the user manual

 

The first step is to look at the owner’s manual that came with your generator. You’ll find every piece of information you need there, so don’t throw it away.

 

From our personal experience, information about spark plugs is provided in the maintenance section. Usually, the specific make and model are noted there.

 

2) Note the required gap

 

When choosing a spark plug for your generator, one of the few features you’ll want to pay close attention to is the suggested gap between the two electrodes.

 

As mentioned, you can find this number in the user guide or manual.

 

The most common generator spark plug specifications are as follows:

 

Socket size:  16mm (5/8”) or 21mm (13/16”)

Gap size: 0.028” – 0.031” (0.7mm – 0.8mm)

 

In our experience, most portable generators require spark plugs with a gap size of 0.028” – 0.031” (0.7mm – 0.8mm). Remember that your particular generator may have a different spark plug gap.

 

That’s why you always need to double-check it in the manual.

 

You should also have a 5/8” (16mm) or 13/16” (21mm) socket and ratchet ready in case you want to replace the spark plugs yourself.

 

You need to be aware that inserting a different type of spark plug than recommended could cause severe damage to your engine and be very expensive to repair.

 

That’s why you should always get your generator’s correct model and type.

 

3) Follow the advice

 

You will find information on the required gap measurements in the maintenance section of your owner’s manual and additional advice on choosing the right spark plug.

 

These include:

 

• Mentions of compatible brands
• Specific models for each brand
• Allowable electrode materials

 

Remember that if you decide not to follow the recommendations in your owner’s manual, your generator’s warranty may be voided.

 

4) Pursue quality instead of price

 

Last, it would be best to never save on your generator’s spark plugs. Preferring a low price over a high-quality product can lead to many worries later.

 

Rather than trying to save a few bucks, spend a little more on high-quality spark plugs made by reliable brands such as BISON.

 

Keep in mind that individual generators may require different types of spark plugs.

 

5) Seek professional help

 

Are you worried about choosing the wrong spark plugs and damaging your engine? If you’re unsure how to select the right spark plugs for your generator, seek help from an expert.

 

It’s better to admit you need help than to wreak havoc on your engine.

 

Call your local dealer or retailer for your generator brand, and we bet they will be more than happy to assist you.

 

6) Have a spare plug on hand

 

Our final recommendation is to purchase at least a few spare spark plugs as soon as possible. Since this spare part isn’t expensive and won’t spoil if stored properly, you can purchase at least a few beforehand.

 

Once the power is out and the spark plugs are damaged, you might have difficulty finding the correct model in your area.

 

Also, spark plugs can become challenging once hurricane season begins.

 

7) Engine size and type

 

When selecting spark plugs for a generator, the size and type of the engine must be considered. Typically, the owner’s manual contains this information. Spark plugs have different heat ranges, which determine how quickly the plug transfers heat away from the combustion chamber. Using the wrong heat range can result in poor engine performance, premature wear, and even engine damage.

 

For example, generators with smaller engine sizes (e.g., 1000-2000 watts) may require spark plugs with cooler and hotter ranges to prevent fouling. On the other hand, generators with larger engine sizes (e.g., 5000-7500 watts) may require spark plugs with a higher thermal range to prevent an explosion.

 

Also, some generators may have a specific engine type, such as OHV (overhead valve) or OHC (overhead cam). Selecting spark plugs compatible with your engine type is critical to ensuring proper ignition and performance.

 

8) Operating conditions

 

Different conditions, such as temperature, altitude, humidity, and fuel quality, can affect the performance of spark plugs. For example, a high-altitude location may require different spark plugs than a lower-altitude location due to changes in air pressure. Also, extreme temperatures may need another spark plug type to ensure proper ignition.

 

9) Thread size

 

The thread size of the spark plug is also essential when choosing a replacement spark plug. It refers to the diameter and pitch of the threads on the plug that screws into the engine cylinder head. Using spark plugs with the wrong thread size can damage your engine’s cylinder head and cause the spark plugs to seize, making them difficult to remove.

 

To determine the proper thread size, consult your owner’s manual or a qualified technician. Although other diameters are available, 14mm and 18mm are portable generators’ most common thread sizes.

 

When shopping for replacement spark plugs, double-check the thread size to ensure they are compatible with your generator’s engine.

 

Buying guide: Choosing the best spark plugs for your generator

 

There are several key factors to consider when shopping for the best spark plugs for your generator. The right spark plugs can dramatically affect the performance and life of your generator, so it’s essential to choose wisely. Here are some important things to remember:

 

a) Size

 

You should first consider the size of your spark plugs. Different generators require different sizes, so ensure you get the right one. You can usually find sizing information in your generator’s owner’s manual or by examining old spark plugs.

 

b) Material

 

The material grade of the spark plug is also essential. Copper, platinum, and iridium are the most commonly used materials for spark plugs. Copper is a good choice for everyday use, while platinum and iridium are more durable and perform better in some situations.

 

c) Life

 

Spark plug life is another crucial factor to consider. You want to avoid changing your spark plugs too often, so look for something durable. Many manufacturers offer longer-life spark plugs, which can save you money and inconvenience in the long run.

 

d) Brand

 

Finally, it is worth considering the brand of spark plugs. There are many well-known brands in the market, such as BISON. Look for items with good reviews and a proven reliability and quality track record.

 

The benefits of having the right spark plugs for your generator

 

a) Improve engine efficiency and performance

 

Upgrading to higher-quality spark plugs can improve engine efficiency and performance. Your generator will run more smoothly, and you will see a jump in power output due to less heat loss and energy wasted in discharge.

 

b) Better fuel economy

 

The right spark plug also helps improve fuel economy by igniting the fuel mixture more efficiently, reducing wasted fuel, and increasing power.

 

c) Enhanced durability

 

High-quality spark plugs last longer, which means you won’t need to replace them as often. This saves you energy and money in the long run.

 

d) Improved startup

 

Reliable spark plugs make starting your generator much more accessible, even in cold weather conditions. This is especially useful if you live in an area with severe winters.

 

e) Cleaner emissions

 

The correct spark plugs can also help reduce harmful emissions from your generator. Regular use of your generator can reduce your carbon footprint and improve air quality, which is especially important if you use your generator a lot.

 

f) Reduce maintenance

 

By upgrading to higher-quality spark plugs, you can reduce generator maintenance. In the long run, this saves you time and money and reduces maintenance interruptions.

 

FAQs

 

1) Can spark plugs improve the performance of a generator?

 

By using spark plugs for your generator, you can increase the efficiency of your engine. When you regularly change the spark plugs, it keeps the engine running at peak performance. As with most engines, the spark plugs in your alternator will have difficulty getting the spark needed to start the engine when damaged or worn. Your generator needs the best spark plugs to allow your engine and the rest of your machine to perform at peak every time you use it. A faulty spark plug can make the engine misfire, bringing you and your work to a halt. With the right plugs, your generator can spark at the correct voltage and combustion, allowing the engine to start quickly and efficiently.

 

2) How long does the spark plug on a generator last?

 

The spark plugs on your generator usually need to be checked after 25 hours of use, or you can plan to check them at least once a season. When doing this inspection, look for signs of frayed or cracked plugs. It is also essential to check the spark plug gap. When the spark plug fires, it must pass through the gap to make the engine run. This gap creates an arc between the two leads so that the current is passed to start the motor. Each lead is a small piece of metal between which sparks dance. Correct gap measurement is essential because if the gap is too large, the spark cannot jump. Due to normal wear and temperature changes, the gap tends to grow, making the engine difficult to start and reducing fuel efficiency.

 

3) How do you know if the spark plugs in your generator are bad?

 

There are a few ways to tell if the spark plugs in your generator are bad. After starting the machine, you may hear a constant rattling, popping, or knocking sound. Also, if you have trouble starting the generator or it feels very erratic when you try to start it, there is likely a problem with the spark plugs. These are telltale signs of a failing and worn generator spark plug. You can expect the spark plugs to be replaced after 25 hours of use in various weather conditions.

 

4) Does it help to clean the spark plugs?

 

Spark plugs cannot be cleaned enough to work like new ones. It is best to replace contaminated or damaged spark plugs.

 

5) Can I use any spark plugs with my generator?

 

No, it will help if you only use the spark plugs recommended by the generator manufacturer. Using the wrong type or size of spark plugs can damage your generator and be potentially dangerous.

 

 

 

6) How do spark plugs work?

 

Spark plugs are a critical component of any portable generator ignition system. Pulling the rewind rope or using the electric start, the ignition system provides a spark inside the combustion chamber to start your little engine.

 

The ignition system consists of the following parts:

 

• The ignition armature, whose copper wire windings are mounted near the flywheel
• Magnets are placed on the surface of the flywheel,
• Spark plugs and spark plug leads are connected to the armature.
• When you spin the flywheel by pulling on the rewound cord, a magnet passes through the firing armature winding, and an electromotive force is induced with each rotation. This electromotive force generates an electric current, which creates a high-voltage spark at the tip of the spark plug. The system is tuned so that the spark is only generated when the piston is at the point of maximum compression of the air-fuel mixture, allowing for optimum engine performance.

 

Modern solid-state ignition systems require approximately 10,000 to 20,000 volts to produce a spark across the spark plug gap. When the magnet is brought close, the tiny transistor closes the circuit, converting the current generated at 2 – 3 A into a high voltage that is fed to the spark plug through the spark plug lead.

 

7) What are the most common problems with spark plugs?

 

One of the most common problems with spark plugs is that they can become contaminated or damaged over time, causing the engine to misfire. Another common problem is that spark plugs can become corroded, which can cause them to lose their ability to produce a spark.

 

Conclusion

 

Choosing the right spark plugs for your generator ensures it runs efficiently and consistently. Before purchasing, it is important to consider details such as your spark plugs’ size, composition, and lifespan. Choosing the correct spark plug can improve the efficiency and life of the generator manufacturer. If you’re still trying to decide which spark plugs to use, read the manufacturer’s recommendations or seek guidance from an expert. You can run your generator for years without interruption with the right spark plugs.